The Quickslider is added via Drag & Drop, not by shortcode. Simply go to Dashboard > PageLines > Drag & Drop and select either Page Templates (full width) or Content Area (sidebars next to the slider) and drag the Quickslider over from the right side to Active Sections. Edit the slider via the page, and make sure the template used matches the one on your page.

@juslee
As Rangelone stated this is a drag and drop section and therefore has no shortcode functionality. However, we do have a similar shortcode for a Carousel, I have provided you with a link to our shortcode demo page, which has more information.